Why not just go all Campy by picking up some second hand Veloce / Daytona double cranksets off of Ebay and re-taping or installing helicoils for the pedal axles? You can put your Campy Chorus stuff on one side (just retap the single arm for your right front crank) and the other grade on the left side if you can't find Campy at the right price point to meet your target.